Textures not displaying properly in WebGL build

Hello, we are currently struggling with an issue where the textures and lighting of a 3D model are not displaying properly in a WebGL build. The top image is what we see in the editor, the bottom is what we see in the build.

Some additional info:

All models are loaded from an asset bundle

All textures do not have any import settings overwritten for WebGL and are set to the defaul "Low Quality" compression level.

Mip maps are enabled

The standard specular shader is used

All models have a main texture and a normal map

The transparent skin is not a transparent texture but instead faded down using the alpha value of the albedo color

We are using Unity 2017.1.0p3

If y'all have any idea what might be causing this I would appreciate any help.